After some pretty shocking plot twist (a wedding, a character death, some huge natural or apocalyptic disaster) Jeph will tie the ends off nicely with one of those "Where are they now?" comics that's set 20 years in the future.
"Hannelore went on to become the CEO of a vast empire of corporate and consumer cleaning services. She makes more money than both of her parents, and has entered into a rather satisfying relationship with version 4.5 of the boyfriend robot."
"Raven went on to win the Nobel Prize for Chemistry after discovering a compound that would safely and completely rid the world of all its chemical and nuclear waste. She claims she was just trying to make espresso."
"Marten and Dora dated for a while, weathering a few pregnancy scares, before they figured out that they just weren't right for each other. They each lead rather contented lives with their significant others, but they occasionally wonder if their relationship's demise could have been averted."
"Penelope reveals her true identity to be that of Pizza Girl in a bestseller tell-all autobiography that is the start of her highly successful literary career. She is courted from time to time by a cloaked stranger, but chooses not to out her secret admirer, lest her hopes be destroyed."
"Angus is happily married with two kids. After finally getting the picture that Faye wasn't interested, he turned his affections on someone else, who reciprocated."
"Marten no longer keeps up with Steve, but we understand that Steve reunited with Ellen for a brief period of time. Nothing more is known."
"Sven revived his music career in an effort to pay the bills, but he found fame and fortune that he had never known before. Not yet married, it is unclear whether Sven was able to shake Faye out of his system."
"Faye returned to the south after Marten and Dora left Massachusetts, finally facing her demons. She looks back at the last twenty or so years with great happiness, recognizing that it was all of her friends who helped her become whole again."
The strip ends with the gang each visiting the coffee shop, which has since been converted into some other business. Individually, they reminisce about the past, marveling at how quickly it turned into the future.
Jeph ties up most ends, but he leaves certain things unsaid--mostly about whether or not people are really happy. It's like life, really. We get somewhere and we look back, wondering if the decisions we made were the right ones, always wondering if we're as happy as we could be. An appropriately bittersweet ending, and one with plenty of mystery for us as readers.
Of course, this is all just my projection. I think we should listen to Jeph and his truck theory, if only because he's the author.